EXHIBIT 3(c)

BY-LAWS

KENTUCKY UTILITIES COMPANY

ARTICLE I

STOCK TRANSFERS

Section 1. Each holder of fully paid stock shall be entitled to a certificate or certificates of stock stating the number and the class of shares owned by such holder, provided that, the Board of Directors may, by resolution, authorize the issue of some or all of the shares of any or all classes or series of stock without certificates. All certificates of stock shall, at the time of their issuance, be signed by the Chairman of the Board, the President or a Vice-President and by the Secretary or Assistant Secretary, and may be authenticated and registered by a duly appointed registrar. If the stock certificate is authenticated by a registrar, the signatures of the corporate officers may be facsimiles. In case any officer designated for the purpose who has signed or whose facsimile signature has been used on any stock certificate shall, from any cause, cease to be such officer before the certificate has been delivered by the Company, the certificate may nevertheless be adopted by the Company and be issued and delivered as though the person had not ceased to be such officer.

Section 2. Shares of stock shall be transferable only on the books of the Company and upon proper endorsement and surrender of the outstanding certificates representing the same. If any outstanding certificate of stock shall be lost, destroyed or stolen, the officers of the Company shall have authority to cause a new certificate to be issued to replace such certificate upon the receipt by the Company of satisfactory evidence that such certificate has been lost, destroyed or stolen and of a bond of indemnity deemed sufficient by the officers to protect the Company and any registrar and any transfer agent of the Company against loss which may be sustained by reason of issuing such new certificate to replace the certificate reported lost, destroyed or stolen; and any transfer agent of the Company shall be authorized to issue and deliver such new certificate and any registrar of the Company is authorized to register such new certificate, upon written directions signed by the Chairman of the Board, the President or a Vice-President and by the Treasurer or the Secretary of the Company.

Section 3. All certificates representing each class of stock shall be numbered and a record of each certificate shall be kept showing the name of the person to whom the certificate was issued with the number and the class of shares and the date thereof. All certificates exchanged or returned to the Company shall be cancelled and an appropriate record made.

Section 4. The Board of Directors may fix a date not exceeding seventy days preceding the date of any meeting of shareholders, or the date fixed for the payment of any dividend or distribution, or the date of allotment of rights, or, subject to contract rights with respect thereto,

the date when any change or conversion or exchange of shares shall be made or go into effect, as a record date for the determination of the shareholders entitled to notice of and to vote at any such meeting, or entitled to receive payment of any such dividend, or allotment of rights, or to exercise the rights with respect to any such change, conversion or exchange of shares, and in such case only shareholders of record on the date so fixed shall be entitled to notice of and to vote at such meeting, or to receive payment of such dividend or allotment of rights or to exercise such rights, as the case may be, notwithstanding any transfer of shares on the books of the Company after the record date fixed as aforesaid. The Board of Directors may close the books of the Company against transfer of shares during the whole or any part of such period. When a determination of shareholders entitled to notice of and to vote at any meeting of shareholders has been made as provided in this section, such determination shall apply to any adjournment thereof except as otherwise provided by statute.

ARTICLE II

MEETINGS OF STOCKHOLDERS

Section 1. An Annual Meeting of Stockholders of the Company shall be held at such date and time as shall be designated from time to time by the Board of Directors. Each such Annual Meeting shall be held at the principal office of the Company in Kentucky or at such other place as the Board of Directors may designate from time to time.

Section 2. Special meetings of the stockholders may be called by the Board of Directors or by the holders of not less than 51% of all the votes entitled to be cast on each issue proposed to be considered at the special meeting, or in such other manner as may be provided by statute. Business transacted at special meetings shall be confined to the purposes stated in the notice of meeting.

Section 3. Notice of the time and place of each annual or special meeting of stockholders shall be sent by mail to the recorded address of each stockholder entitled to vote not less than ten or more than sixty days before the date of the meeting, except in cases where other special method of notice may be required by statute, in which case the statutory method shall be followed. The notice of special meeting shall state the object of the meeting. Notice of any meeting of the stockholders may be waived by any stockholder.

Section 4. At an Annual Meeting of the Stockholders, only such business shall be conducted as shall have been properly brought before the meeting in accordance with the procedures set forth in these By-laws. To be properly brought before the Annual Meeting, business must be (a) specified in the notice of meeting (or any supplement thereto) given by or at the direction of the Board of Directors, (b) otherwise properly brought before the meeting by or at the direction of the Board of Directors, or (c) otherwise be a proper matter for consideration and otherwise be properly requested to be brought before the meeting by a stockholder as hereinafter provided. For business to be properly requested to be brought before an Annual Meeting by a stockholder, a stockholder of a class of shares of the Company entitled to vote upon the matter requested to be brought before the meeting (or his designated proxy as provided below) must have given timely and proper notice thereof to the Secretary. To be timely, a

stockholder’s notice must be given by personal delivery or mailed by United States mail, postage prepaid, and received by the Secretary not fewer than sixty calendar days prior to the meeting; provided, however, that in the event that the date of the meeting is not publicly announced by mail, press release or otherwise or disclosed in a public report, information statement, or other filing made with the Securities and Exchange Commission, in either case, at least seventy calendar days prior to the meeting, notice by the stockholder to be timely must be received by the Secretary, as provided above, not later than the close of business on the tenth day following the day on which such notice of the date of the meeting or such public disclosure or filing was made. To be proper, a stockholder’s notice to the Secretary must be in writing and must set forth as to each matter the stockholder proposes to bring before the Annual Meeting (a) a description in reasonable detail of the business desired to be brought before the Annual Meeting and the reasons for conducting such business at the Annual Meeting, (b) the name and address, as they appear on the Company books, of the stockholder proposing such business or granting a proxy to the proponent or an intermediary, (c) a representation that the stockholder is a holder of record of stock of the Company entitled to vote at such meeting and intends to appear in person or by proxy at the meeting to nominate the person or persons specified in the notice, (d) the name and address of the proponent, if the holder of a proxy from a qualified stockholder of record, and the names and addresses of any intermediate proxies, (e) the class and number of shares of the Company which are beneficially owned by the stockholder, and (f) any material interest of the stockholder or the proponent in such business. The chairman of an Annual Meeting shall determine whether business was properly brought before the meeting, which determination absent manifest error will be conclusive for all purposes.

Section 5. The Chairman of the Board, if present, and in his absence the President, and the Secretary of the Company, shall act as Chairman and Secretary, respectively, at each stockholders meeting, unless otherwise provided by the Board of Directors prior to the meeting. Unless otherwise determined by the Board of Directors prior to the meeting, the Chairman of the stockholders’ meeting shall determine the order of business and shall have the authority in his discretion to regulate the conduct of any such meeting, including, without limitation, by imposing restrictions on the persons (other than stockholders of the Company or their duly appointed proxies) who may attend any such stockholders’ meeting, by determining whether any stockholder or his proxy may be excluded from any stockholders’ meeting based upon any determination by the Chairman, in his sole discretion, that any such person has unduly disrupted or is likely to disrupt the proceedings thereat, and by regulating the circumstances in which any person may make a statement or ask questions at any stockholders’ meeting.

Section 6. The Company shall be entitled to treat the holder of record of any share or shares as the holder in fact thereof and, accordingly, shall not be bound to recognize any equitable or other claim to or interest in such share on the part of any other person whether or not it shall have express or other notice thereof, except as expressly provided by law.

Section 7. The Board of Directors may postpone and reschedule any previously scheduled annual or special meeting of stockholders and may adjourn any convened meeting of stockholders to another date and time as specified by the chairman of the meeting.

ARTICLE III

BOARD OF DIRECTORS

Section 1. The Board shall be composed of such number of Directors as shall be set by resolution of the Board. The number of Directors may be changed from time to time by resolution of the Board of Directors or by amendment to these By-laws, but no decrease in the number of Directors shall have the effect of shortening the term of any incumbent Director. Unless a Director dies, resigns or is removed, he shall hold office until the next annual meeting of the shareholders or until a successor is elected, whichever is later. Directors need not be shareholders of the corporation or residents of the Commonwealth of Kentucky or of the Commonwealth of Virginia. Except as otherwise expressly provided by the Articles of Incorporation, the Board of Directors may fill, until the first annual election thereafter and until the necessary election shall have taken place, vacancies occurring at any time in the membership of the Board by death, resignation or otherwise. Written notice of such resignation shall be made as provided by law.

Section 2. Nominations for the election of directors may be made by the Board of Directors or a committee appointed by the Board of Directors or by any stockholder entitled to vote in the election of directors generally. However, any stockholder entitled to vote in the election of directors generally may nominate one or more persons for election as directors at a meeting only if the stockholder has given timely and proper notice thereof to the Secretary. To be timely, a stockholder’s notice must be given by personal delivery or mailed by United States mail, postage prepaid, and received by the Secretary not fewer than sixty calendar days or more than ninety calendar days prior to the meeting; provided, however, that in the event that the date of the meeting is not publicly announced by mail, press release or otherwise or disclosed in a public report, information statement or other filing made with the Securities and Exchange Commission, in either case, at least seventy calendar days prior to the meeting, notice by the stockholder to be timely must be so received by the Secretary, as provided above, not later than the close of business on the tenth day following the day on which such notice of the date of the meeting or such public disclosure or filing was made. To be proper, a stockholder’s notice of nomination to the Secretary must be in writing and must set forth as to each nominee: (a) the name and address, as they appear on the Company books, of the stockholder who intends to make the nomination or granting a proxy to the proponent or an intermediary; (b) the name and address of the person or persons to be nominated; (c) a representation that the stockholder is a holder of record of stock of the Company entitled to vote at such meeting and intends to appear in person or by proxy at the meeting to nominate the person or persons specified in the notice; (d) a description of all arrangements or understandings between the stockholder and each nominee and any other person or persons (naming such person or persons) pursuant to which the nomination or nominations are to be made by the stockholder; (e) such other information regarding each nominee proposed by such stockholder as would be required to be included in a proxy statement filed pursuant to the proxy rules of the Securities and Exchange Commission, had the nominee been nominated, or intended to be nominated, by the Board of Directors, provided that (i) such information does not in any way violate any applicable Securities and Exchange Commission regulation, including regulations concerning public availability of information, and (ii) any information withheld on such basis shall be provided by separate notice

at such time as would not be in violation of any applicable Securities and Exchange Commission regulation, such notice to be a supplement to the notice otherwise required herein; (f) the class and number of shares of the Company which are beneficially owned by the stockholder; and (g) the signed consent of each nominee to serve as a director of the Company if so elected.

Section 3. If the Chairman of the meeting for the election of Directors determines that a nomination of any candidate for election as a director at such meeting was not made in accordance with the applicable provisions of these By-laws, such nomination shall be void.

Section 4. The Board of Directors may adopt such special rules and regulations for the conduct of their meetings and the management of the affairs of the Company as they may determine to be appropriate, not inconsistent with law or these By-laws.

Section 5. A regular meeting of the Board of Directors shall be held as soon as practicable after the annual meeting of stockholders in each year. In addition, regular quarterly meetings of the Board may be held at the general offices of the Company in Kentucky, or at such other place as shall be specified in the notice of such meeting on the last Monday of January, July and October in each year. Written notice of every regular meeting of the Board, stating the time of day at which such meeting will be held, shall be given to each Director not less than two days prior to the date of the meeting. Such notice may be given personally in writing, or by telegraph or other written means of electronic communication, or by depositing the same, properly addressed, in the mail.

Section 6. Special meetings of the Board may be called at any time by the Chairman of the Board, or the President, or by a Vice-President when acting as President, or by any two Directors. Notice of such meeting, stating the place, day and hour of the meeting shall be given to each Director not less than one day prior to the date of the meeting. Such notice may be given personally in writing, or by telegraph or other written means of electronic communication, or by depositing the same, properly addressed, in the mail.

Section 7. Notice of any meeting of the Board may be waived by any Director.

Section 8. A majority of the Board of Directors shall constitute a quorum for the transaction of business at any meeting of the board, but a less number may adjourn the meeting to some other day or sine die. The Board of Directors shall keep minutes of their proceedings at their meetings. The members of the Board may be paid such fees or compensations for their services as Directors as the Board, from time to time, by resolution, may determine.

Section 9. The Chairman of the Board, if such person is present, shall serve as Chairman at each regular or special meeting of the Board of Directors and shall determine the order of business at such meeting. If the Chairman of the Board is not present at a regular or special meeting of the Board of Directors, the Vice Chairman of the Board shall serve as Chairman of such meeting and shall determine the order of business of such meeting. The Board of Directors may elect one of its members as Vice Chairman of the Board.

ARTICLE IV

COMMITTEES

Section 1. The Board of Directors may, by resolution passed by a majority of the whole Board, appoint an Executive Committee of not less than three members of the Board, including the Chairman of the Board, if there be one, and the President of the Company. The Executive Committee may make its own rules of procedure and elect its Chairman, and shall meet where and as provided by such rules, or by resolution of the Board of Directors. A majority of the members of the Committee shall constitute a quorum for the transaction of business. During the intervals between the meetings of the Board of Directors, the Executive Committee shall have all the powers of the Board in the management of the business and affairs of the Company except as limited by statute, including power to authorize the seal of the Company to be affixed to all papers which require it, and, by majority vote of all its members, may exercise any and all such powers in such manner as such Committee shall deem best for the interests of the Company, in all cases in which specific directions shall not have been given by the Board of Directors. The Executive Committee shall keep regular minutes of its proceedings and report the same to the Board at meetings thereof.

Section 2. The Board of Directors may appoint other committees, standing or special, from time to time from among their own number, or otherwise, and confer powers on such committees, and revoke such powers and terminate the existence of such committees at its pleasure.

Section 3. Meetings of any committee may be called in such manner and may be held at such times and places as such committee may by resolution determine, provided that a meeting of any committee may be called at any time by the Chairman of the Board or by the President. Notice of such meeting, stating the place, day and hour of the meeting shall be given to each Director not less than one day prior to the meeting. Such notice may be given personally in writing, or by telegraph or other written means of electronic communication, or by depositing the same, properly addressed, in the mail. Members of all committees may be paid such fees for attendance at meetings as the Board of Directors may determine.

ARTICLE V

OFFICERS

Section 1. The officers of the Company shall be a Chief Executive Officer, President, Chief Operating Officer, Chief Financial Officer, Chief Administrative Officer, one or more Vice Presidents, Secretary, Treasurer, Controller or such other officers (including, if so directed by a resolution of the Board of Directors, the Chairman of the Board) as the Board or the Chief Executive Officer may from time to time elect or appoint. Any two of the offices may be combined in one person, but no officer shall execute, acknowledge, or verify any instrument in more than one capacity. If practicable, officers are to be elected or appointed by the Board of Directors or the Chief Executive Officer at the first meeting of the Board following the annual

meeting of stockholders and, unless otherwise specified, shall hold office for one year or until their successors are elected and qualified. Any vacancy shall be filled by the Board of Directors or the Chief Executive Officer. Except as provided below, officers shall perform those duties usually incident to the office or as otherwise required by the Board of Directors, the Chief Executive Officer, or the officer to whom they report. An officer may be removed with or without cause and at any time by the Board of Directors or by the Chief Executive Officer.

Section 2. The Chief Executive Officer of the Company shall have full charge of all of the affairs of the Company and shall report directly to the Board of Directors.

Section 3. The President, should that office be created and filled, shall exercise such functions as may be delegated by the Chief Executive Officer and shall exercise the functions of the Chief Executive Officer during the absence or disability of the Chief Executive Officer.

Section 4. The Chief Operating Officer, should that office be created and filled, shall have responsibility for the management and direction of the Company, subject to the direction and approval of the Chief Executive Officer.

Section 5. The Chief Financial Officer, should that office be created and filled, shall have responsibility for the financial affairs of the Company, including maintaining accurate books and records, meeting all financial reporting requirements and controlling Company funds, subject to the direction and approval of the Chief Executive Officer.

Section 6. The Chief Administrative Officer, should that office be created and filled, shall have responsibility for the general administrative and human resources operations of the Company, subject to the direction and approval of the Chief Executive Officer.

Section 7. The Vice President or Vice Presidents, should such offices be created and filled, may be designated as Vice President, Senior Vice President or Executive Vice President, as the Board of Directors or Chief Executive Officer may determine.

Section 8. The Secretary shall be present at and record the proceedings of all meetings of the Board of Directors and of the stockholders, give notices of meetings of Directors and stockholders, have custody of the seal of the Company and affix it to any instrument requiring the same, and shall have the power to sign certificates for shares of stock of the Company.

Section 9. The Treasurer, should that office be created and filled, shall have responsibility for all receipts and disbursements of the Company and be custodian of the Company’s funds.

Section 10. The Controller, should that office be created and filled, shall have responsibility for the accounting records of the Company.

ARTICLE VI

MISCELLANEOUS

Section 1. The funds of the Company shall be deposited to its credit in such banks or trust companies as are selected by the Treasurer, subject to the approval of the chief executive officer. Such funds shall be withdrawn only on checks or drafts of the Company for the purpose of the Company, except that such funds may be withdrawn without the issuance of a check or draft (a) to effect a transfer of funds between accounts maintained by the Company at one or more depositaries; (b) to effect the withdrawal of funds, pursuant to resolution of the Board of Directors, for the payment of either commercial paper promissory notes of other entities or government securities purchased by the Company; (c) to effect a withdrawal of funds by the Company pursuant to the terms of any agreement or other document, approved by the Board of Directors, which requires or contemplates payment or payments by the Company by means other than a check or draft; or (d) to effect a withdrawal of funds for such other purpose as the Board of Directors by resolution shall provide. All checks and drafts of the Company shall be signed in such manner and by such officer or officers or such individuals as the Board of Directors, from time to time by resolution, shall determine. Only checks and drafts so signed shall be valid checks or drafts of the Company.

Section 2. No debt shall be contracted except for current expenses unless authorized by the Board of Directors or the Executive Committee, and no bills shall be paid by the Treasurer unless audited and approved by the Controller or some other person or committee expressly authorized by the Board of Directors or the Executive Committee, to audit and approve bills for payment. All notes of the Company shall be executed by two different officers of the Company. Either or both of such executions may be by facsimile.

Section 3. The fiscal year of the Company shall close at the end of December annually.

ARTICLE VII

INDEMNIFICATION OF DIRECTORS, OFFICERS,

EMPLOYEES AND AGENTS

Section 1. Unless prohibited by law, the Company shall indemnify each of its Directors, officers, employees and agents against expenses (including attorneys’ fees), judgments, taxes, fines and amounts paid in settlement, incurred by such person in connection with, and shall advance expenses (including attorneys’ fees) incurred by such person in defending any threatened, pending or completed action, suit or proceeding (whether civil, criminal, administrative or investigative) to which such person was, is, or is threatened to be made a party by reason of the fact that such person is or was a Director, officer, employee or agent of another domestic or foreign corporation, partnership, joint venture, trust, other enterprise, or employee benefit plan. Advancement of expenses shall be made upon receipt of a written statement of his good faith belief that he has met the standard of conduct as required by statute and a written undertaking, with such security, if any, as the Board may reasonably require, by or on behalf of

the person seeking indemnification, to repay amounts advanced if it shall ultimately be determined that such person is not entitled to be indemnified by the Company.

Section 2. In addition (and not by way of limitation of) the foregoing provisions of Section 1 of this Article VII and the provisions of the Kentucky Business Corporation Act, each person (including the heirs, executors, administrators and estate of such person) who is or was or had agreed to become a Director, officer, employee or agent of the Company and each person (including the heirs, executors, administrators and estate of such person) who is or was serving or who had agreed to serve at the request of the Directors or any officer of the Company as a Director, officer, employee, trustee, partner or agent of another corporation, partnership, joint venture, trust, employee benefit plan or other enterprise shall be indemnified by the Company to the fullest extent permitted by the Kentucky Business Corporation Act or any other applicable laws as presently or hereafter in effect. Without limiting the generality or the effect of the foregoing, the Company is authorized to enter into one or more agreements with any person which provide for indemnification greater or different than that provided in this Article VII. Any repeal or modification of this Article by the stockholders of the Company shall not adversely affect any indemnification of any person hereunder in respect of any act or omission occurring prior to the time of such repeal or modification.

Section 3. The Company may purchase and maintain insurance on behalf of any person who is or was entitled to indemnification as described above, whether or not the Company would have the power or duty to indemnify such person against such liability under this Article VII or applicable law.

Section 4. To the extent required by applicable law, any indemnification of, or advance of expenses to, any person who is or was entitled to indemnification as described above, if arising out of a proceeding by or in the right of the Company, shall be reported in writing to the stockholders with or before the notice of the next stockholder’ meeting.

Section 5. The indemnification provided by this Article VII: (a) shall not be deemed exclusive of any other rights to which the Company’s Directors, officers, employees or agents may be entitled pursuant to the Articles of Incorporation, any agreement of indemnity, as a matter of law or otherwise; and (b) shall continue as to a person who has ceased to be a Director, officer, employee or agent and shall inure to the benefit of such person’s heirs, executors and administrators.

ARTICLE VIII

AMENDMENT OR REPEAL OF BY-LAWS

These By-laws may be added to, amended or repealed at any meeting of the Board of Directors, and may also be added to, amended or repealed by the stockholders.

BY-LAWS

KENTUCKY UTILITIES COMPANY

Dated April 28, 1998

(as amended through June 2, 1999)

(as amended through December 16, 2003)